diff --git a/utils/he_ipv6/tunnelbroker.py b/utils/he_ipv6/tunnelbroker.py
index 14f762f..ddeabb1 100644
--- a/utils/he_ipv6/tunnelbroker.py
+++ b/utils/he_ipv6/tunnelbroker.py
@@ -212,7 +212,7 @@ class TunnelBroker(object):
         logger.debug('Requesting IP update at provider.')
         req = requests.get(self.url_api,
                            params = {'hostname': str(self.tun.id),
-                                     'myip': str(self.my_ip)},
+                                     'myip': self.my_ip.str},
                            auth = auth_handler)
         if not req.ok:
             logger.error('Could not update IP at provider. Request returned {0}.'.format(req.status_code))